<template>
  <div id="app">
    <el-row>
      <el-col :span="24">
        <div class="green"></div>
      </el-col>
    </el-row>
    <el-row>
      <el-col :span="8">
        <div class="yellow"></div>
      </el-col>
      <el-col :span="8">
        <div class="red"></div>
      </el-col>
      <el-col :span="8">
        <div class="orange"></div>
      </el-col>
    </el-row>
    <el-row :gutter="20">
      <el-col :span="8">
        <div class="yellow"></div>
      </el-col>
      <el-col :span="8">
        <div class="red"></div>
      </el-col>
      <el-col :span="8">
        <div class="orange"></div>
      </el-col>
    </el-row>
  </div>
</template>

<style lang="less">
#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  .el-row {
    height: 20px;
    margin-bottom: 20px;
    .el-col {
      height: 20px;
      margin-bottom: 20px;
      div {
        height: 20px;
        margin-bottom: 20px;
        border-radius: 4px;
      }
      .green {
        background: green;
      }
      .red {
        background: red;
      }
      .yellow {
        background: orange;
      }
      .orange {
        background: orange;
      }
    }
  }
}
</style>
